Cheat Engine

[atom0s]

You are doing a byte by byte compare/scan so the algo you use is not going to matter based on the applications bit mode. A value between 0 and 255 (byte) is going to be the same in 32bit and 64bit.

Looking at your code, you are using PROCESS_ALL_ACCESS, I'd suggest debugging the code and making sure things are returning properly for every API call you are making. Generally, things like this are where your problem are going to be.
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